Ошибка скольжения при загрузке recyclerView «Вы должны передать не нулевой вид»

Question

Привет Я пытаюсь заполнить Grid RecyclerView серией изображений. Для этого я извлекаю URL-адреса изображений из Интернета и загружаю их в список <>. Проблема в том, что, по-видимому, ссылка на ImageView, которую получает адаптер, равна null. Это код:

private class ShowHolder extends RecyclerView.ViewHolder { 
     public ImageView mImageView; 
     public ProgressBar progressBar; 

     public ShowHolder(LayoutInflater inflater, ViewGroup container) { 
      super(inflater.inflate(R.layout.list_item_row, container, false)); 
      mImageView = (ImageView) itemView.findViewById(R.id.imageView); 
      progressBar = (ProgressBar) itemView.findViewById(R.id.progress); 
     } 
    } 

    private class ShowAdapter extends RecyclerView.Adapter<ShowHolder> { 
     private List<Show> mShows; 

     public ShowAdapter(List<Show> shows) { 
      mShows = shows; 
     } 

     @Override 
     public ShowHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
      LayoutInflater layoutInflater = LayoutInflater.from(getActivity()); 
      return new ShowHolder(layoutInflater, parent); 
     } 
     @Override 
     public void onBindViewHolder(ShowHolder holder, int position) { 
      Show currentShow = mShows.get(position); 




      Glide.with(getActivity()) 
        .load(currentShow.getImage()) //image url 
        .listener(new RequestListener<String, GlideDrawable>() { 
         @Override 
         public boolean onException(Exception e, String model, Target<GlideDrawable> target, boolean isFirstResource) { 
          return false; 
         } 

         @Override 
         public boolean onResourceReady(GlideDrawable resource, String model, Target<GlideDrawable> target, boolean isFromMemoryCache, boolean isFirstResource) { 
              holder.progressBar.setVisibility(View.GONE); 
          return false; 
         } 
        }) 
        .into(holder.mImageView); //error here 

     } 
     @Override 
     public int getItemCount() { 
      return mShows.size(); 
     } 
    } 

Это, как я передать URL изображений к адаптеру:

@Override 
    public void onLoadFinished(Loader<List<Show>> loader, List<Show> shows) { 
     // Clear the adapter of previous earthquake data 
     mShowAdapter = new ShowAdapter(null); 
     mShowAdapter.notifyDataSetChanged(); 

     // If there is a valid list of Shows, then add them to the adapter's 
     // data set. This will trigger the ListView to update. 
     Log.v(LOG_TAG, "onLoadFinished@shows: " + shows); 
     if (shows != null && !shows.isEmpty()) { 
      mShowAdapter = new ShowAdapter(shows); 
      mShowAdapter.notifyDataSetChanged(); 
      mRecyclerView.setAdapter(mShowAdapter); 
     } 

     pb.setVisibility(View.GONE); 
    } 

StackTrace:

FATAL EXCEPTION: main 
                   Process: com.dcs.shows, PID: 27818 
                   java.lang.IllegalArgumentException: You must pass in a non null View 
                    at com.bumptech.glide.GenericRequestBuilder.into(GenericRequestBuilder.java:678) 
                    at com.bumptech.glide.DrawableRequestBuilder.into(DrawableRequestBuilder.java:448) 
                    at com.dcs.shows.ListFragment$ShowAdapter.onBindViewHolder(ListFragment.java:154) 
                    at com.dcs.shows.ListFragment$ShowAdapter.onBindViewHolder(ListFragment.java:118) 
                    at android.support.v7.widget.RecyclerView$Adapter.onBindViewHolder(RecyclerView.java:5768) 
                    at android.support.v7.widget.RecyclerView$Adapter.bindViewHolder(RecyclerView.java:5801) 
                    at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:5037) 
                    at android.support.v7.widget.RecyclerView$Recycler.getViewForPosition(RecyclerView.java:4913) 
                    at android.support.v7.widget.LinearLayoutManager$LayoutState.next(LinearLayoutManager.java:2029) 
                    at android.support.v7.widget.GridLayoutManager.layoutChunk(GridLayoutManager.java:531) 
                    at android.support.v7.widget.LinearLayoutManager.fill(LinearLayoutManager.java:1377) 
                    at android.support.v7.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:578) 
                    at android.support.v7.widget.GridLayoutManager.onLayoutChildren(GridLayoutManager.java:170) 
                    at android.support.v7.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:3260) 
                    at android.support.v7.widget.RecyclerView.dispatchLayout(RecyclerView.java:3069) 
                    at android.support.v7.widget.RecyclerView.onLayout(RecyclerView.java:3518) 
                    at android.view.View.layout(View.java:16630) 
                    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
                    at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079) 
                    at android.view.View.layout(View.java:16630) 
                    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
                    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) 
                    at android.widget.FrameLayout.onLayout(FrameLayout.java:273) 
                    at android.view.View.layout(View.java:16630) 
                    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
                    at android.support.design.widget.HeaderScrollingViewBehavior.layoutChild(HeaderScrollingViewBehavior.java:131) 
                    at android.support.design.widget.ViewOffsetBehavior.onLayoutChild(ViewOffsetBehavior.java:42) 
                    at android.support.design.widget.AppBarLayout$ScrollingViewBehavior.onLayoutChild(AppBarLayout.java:1319) 
                    at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:817) 
                    at android.view.View.layout(View.java:16630) 
                    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
                    at android.support.v4.widget.DrawerLayout.onLayout(DrawerLayout.java:1191) 
                    at android.view.View.layout(View.java:16630) 
                    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
                    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) 
                    at android.widget.FrameLayout.onLayout(FrameLayout.java:273) 
                    at android.view.View.layout(View.java:16630) 
                    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
                    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743) 
                    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586) 
                    at android.widget.LinearLayout.onLayout(LinearLayout.java:1495) 
                    at android.view.View.layout(View.java:16630) 
                    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
                    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) 
                    at android.widget.FrameLayout.onLayout(FrameLayout.java:273) 
                    at android.view.View.layout(View.java:16630) 
                    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
                    at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743) 
                    at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586) 
                    at android.widget.LinearLayout.onLayout(LinearLayout.java:1495) 
                    at android.view.View.layout(View.java:16630) 
                    at android.view.ViewGroup.layout(ViewGroup.java:5437) 
                    at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336) 
                    at android.widget.FrameLayout.onLayout(FrameLayout.java:273) 
                    at com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2678) 
                    at android.view.View.layout(View.java:16630) 

Благодаря

Answer 1

Измените метод onCerateViewHolder к :

@Override 
    public ShowHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
      LayoutInflater inflater = LayoutInflater.from(getActivity()); 
      View rootView = inflater.inflate(R.layout.list_item_row, parent, false); 
      return new ShowHolder(rootView); 
    } 

И изменить держатель конструктора:

public ShowHolder(View itemView) { 
      super(itemView); 
      mImageView = (ImageView) itemView.findViewById(R.id.imageView); 
      progressBar = (ProgressBar) itemView.findViewById(R.id.progress); 
    }